Jarinu weather in September

In September, Jarinu sees average daytime highs of 26°C and overnight lows near 15°C, with 94 mm of rain across 8.9 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Jarinu's 4th-clearest and 1st-windiest month. For the whole year in context, see Jarinu's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
5th coldest
Rainfall
94 mm
8.9 wet days
Daylight
11 h 54 min
7:05 AM – 6:57 PM
Cloud cover
50%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.23 kWh/m²
Travel score
7.0
out of 10

Jarinu is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Jarinu reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12614
22614
32614
42614
52614
62614
72614
82615
92615
102615
112615
122615
132615
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262615
272616
282616
292616
302616

Jarinu weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°27823.413.34.3
Feb28° / 19°19419.512.84.3
Mar27° / 18°15918.412.25.2
Apr26° / 17°779.411.56.8
May24° / 14°717.510.97.4
Jun23° / 13°505.210.67.9
Jul23° / 12°494.510.78.0
Aug25° / 13°374.411.28.2
Sep26° / 15°948.911.97.0
Oct27° / 17°14114.112.55.9
Nov27° / 17°18116.713.15.4
Dec27° / 19°22421.313.44.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17129
27030
36931
46832
56733
66634
76634
86436
96337
106238
116238
126139
136040
145941
155941
165743
175644
185644
195545
205446
215347
225248
235248
245149
255050
264951
274852
284753
294753
304654

Chance of precipitation in September

Any precipitation

Jarinu gets around 94 mm of rain over 8.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
119
220
321
421
522
622
723
824
924
1025
1125
1226
1326
1427
1527
1628
1729
1830
1931
2032
2133
2234
2335
2437
2538
2638
2739
2840
2940
3041

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15535100
25436100
35237110
45137120
54938120
64839130
74639140
84540150
94341160
104142170
114043170
123843180
133644190
143545200
153445211
163345211
173245221
183145231
193045241
202945252
212844252
222744263
232743273
242642284
252541294
262441315
272340325
282339336
292238346
302137356

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:21 AM to 6:51 AM, and sunset from 6:53 PM to 7:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:216:53
211.67:206:53
311.67:196:53
411.67:186:54
511.67:176:54
611.67:166:54
711.77:156:54
811.77:146:55
911.77:136:55
1011.77:126:55
1111.87:106:56
1211.87:096:56
1311.87:086:56
1411.87:076:57
1511.87:066:57
1611.97:056:57
1711.97:046:58
1811.97:036:58
1911.97:026:58
2012.07:016:59
2112.07:006:59
2212.06:596:59
2312.06:587:00
2412.16:577:00
2512.16:567:00
2612.16:557:01
2712.16:547:01
2812.16:537:01
2912.26:527:02
3012.26:517:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.23 kWh/m².

For context, solar energy here swings from a low near 3.6 kWh/m² to a high of 5.82 kWh/m² in November across the year — September's 5.23 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Jarinu

In seasonPeak

None of Jarinu's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Jarinu's rainy season runs October–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Jarinu?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.0
Sightseeing
5th-best month of the year
6.7
Beach & pool
2nd-best month of the year

September is one of the better times to visit Jarinu for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Jarinu in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Jarinu sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Jarinu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jarinu peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Jarinu in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Jarinu is worst in June — around 71 µg/m³ PM2.5 (unhealthy), about 2.3× the cleanest month (December, 31 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJun 2370 µg/m³Dec 2031 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb34Moderate
Mar41Poor
Apr48Poor
May62Unhealthy
Jun71Unhealthy
Jul70Unhealthy
Aug60Unhealthy
Sep53Poor
Oct39Poor
Nov32Moderate
Dec31Moderate
Location & terrain

Where is Jarinu?

Jarinu sits at 23.1°S, 46.7°W, 793 m above sea level, in Brazil. The nearest listed city is Campo Limpo Paulista, 13 km away.

Topography around Jarinu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Jarinu.

Within 3 km, the terrain around Jarinu has only modest variations in elevation — a maximum elevation change of 167 m around an average of 812 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 342 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,515 m.

The land around Jarinu is covered by trees (38%) and grassland (33%) within 3 km, trees (44%) and grassland (35%) within 16 km, and trees (45%) and grassland (28%) within 80 km.

3 km
167 m
16 km
342 m
80 km
1,515 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Campo Limpo Paulista 13 km · Itatiba 16 km · Várzea Paulista 16 km · Atibaia 18 km · Jundiaí 19 km · Francisco Morato 20 km · Louveira 23 km · Franco da Rocha 24 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Jarinu (-23.1014°, -46.7283°, elevation 793 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).